Tool for applying fuse links to fused cutouts



March 23,1948. Dj'c. HUBBARD TOOL FOR APPLYING FUSE LINKS TO FUSED CUTOU'I'S Filed Feb. 12, 1947 2 Sheets-Sheet 1 I N V E N TOR.

David Q Hubbard ATTORNEY March 1948- D. c. HUBBARD 38,121

TOOL FOR APPLYING FUSE LINKS TO FUSED CUTOUTS Filed Feb. 12, 1947 2 Sheets-Sheet 2 F@- 7 INVENTOR. David C llabbard BY I ATTORNEY ?atented Mar. 23, 1948 TOOL FOR APPLYING FUSE LINKS TO FUSED CUTOUTS David C. Hubbard, Centralia, Mo., assignor to A. B. Chance Company, Centralia, Mo., a. cor-- poration of Missouri Application February 12, 1947, Serial No. 728,122

9 Claims. 1

The present invention relates to tools for applying fuse links to fused cutouts, and is particularly concerned with tools adapted to be used with devices of the exposed fuse link type.

One of the objects of the invention is the provision of an improved tool adapted to hold a fuse link in such position that it may be readily controlled under all conditions, and so that it cannot sway due to wind or other causes, in order that it may be quickly and safely engaged with the contacts of an open type fused cutout, regardless of the position in which the contact fingers cf the cutout are arranged.

Another object of the invention is the provision of an improved tool for applying fuse links to a fused cutout which is adapted to be used with the same facility, whether the contact fingers of the fused cutout be arranged horizontally, vertically or at an angle to these positions.

Another object of the invention'is to eliminate the hazards which are encountered with the devices of the prior art in which the fuse link dangles from 2. prong type disconnect stick or similar device, so that the links are not under complete control of the operator, frequently falling off the stick, and when so dangling from a tool of the prior art the links are not adaptable to application to cutout arms which approach a horizontal position for the fuse link.

Another object of the invention is the provision of a tool of the class described which is adapted to protect the operator's face, and particularly his eyes, from the flying fragments and from the flash which may result if a short circuit condition exists at the time when the fuse is being applied to the cutout on an energized circuit.

A further object of the invention is the provision of an improved device of the class described which will eliminate the necessity for the repairman going to the nearest switch or circuit breaker to isolate the circuit before it is refused, and then, after re-fusing the cutout, again traveling to the circuit opening device to reclose the circuit, and returning a second time to inspect the refused cutout, the present device being applicable directly to the re-fusing of a cutout without isolating the circuit.

Another object of the invention is the provision of an improved tool for the application of fuses to fused cutouts which maintains the fuse unit under a predetermined tension, but holds it in such manner that the annular shoulders at each end of the fuse unit are in position to be engaged by the arms of the fused cutout and in such manner that the tool may be manipulated after the fused unit is engaged with the arms of the fused cutout and the tool may be readily released from the fuse unit, leaving it on the cutout.

Another object of the invention is the provision of an improved tool of the class described which may also be used for removing fuses from a fused cutout, which is adapted to be manufac tured at a low cost, which is sturdy, simple, and which presents a high factor of safety for the user, irrespective of the way in which the contacts of the fused cutout may be arranged.

Other objects and advantages of the invention will be apparent from the following description and the accompanying drawings, in which similar characters of reference indicate similar parts throughout the several views.

Referring to the drawings, of which there are two sheets,

Fig, 1 is a side elevational view showing the tool in connection with a standard fuse unit or fuse link.

Fig. 2 is a front elevational view taken from the right of Fig. 1.

Fig. 3 is a rear elevational view taken from the left of Fig. 1.

Fig. 4 is a view in perspective, showing the arrangement of the tool when carried by a universal pole and provided'with a. fuse link which is to be applied to a cutout of the fused type.

Fig. 5 is a side elevational view showing the first step in the use of the tool in securing the fuse link to the movable arm or contact finger of the cutout.

Fig. 6 is a similar view showing the next step in the application of the fuse link, which comprises the tensioning of the movable arm of the cutout and the application of the upper end of the link to the fixed arm.

Fig. 7 is another similar view showing the positions of the parts after the upper hook of the tool has been removed from the upper end of the link, and the operator is about to remove the lower end of the tool from the lower end of the link.

Fig. 8 is a fragmentary elevational view showing the other side of the supporting fixture carried at the top of Fig. 1.

Fig. 9 is a fragmentary plan view showing the contact fingers at the end of a fused cutout arm to which the link is to be applied.

Referring to Figs. 4 to 7, the present tool is indicated in its entirety by the numeral l0, and it is preferably so arranged that it may be mounted upon an operating pole H of the universal type, which is adapted to be used with a multiplicity of different tools. In some embodiments of the invention the present tool may be mounted upon a separate pole of its own, but even in such case it is preferably so arranged that it may be ad justed at different angles to the pole.

The operating pole ll includes an elongated wooden pole l2 which is provided at its upper end with a ferrule or fixture l3 having a cylindrical socket for receiving the wooden pole 12. The fixture I3 is secured on the pole l2 by means of a plurality of rivets passing through the pole and fixture, and the fixture includes an axially extending flange it provided with a centrally located threaded bore for receiving the threaded wing bolt l5 which is preferably provided with an annular clamping flange l6.

The bolt l5 projects from the face or'the flange M which is located substantially diametrically across the end of the ferrule l3, and the face I! of flange I4 is provided with a plurality of radially extending ribs and grooves surrounding the shank of bolt I5.

Referring to Figs. 1 to 3 and 8, the tool I is provided with a supporting member [8 havinga substantially circular body l9 provided with a face 20 which is complementary to the face H in that it has complementary and radially extending ribs and grooves on the face H. The body IQ of the supporting member 18 has an inwardly extending slot 2! which is adapted to pass the shank of the screw bolt so that the screw bolt may have its shank located in the central, partially cylindrical portion 22 of the slot 2|. In this position the supporting member l8 may be rotated to any desired angular position in which its ribs and grooves will fit the ribs and grooves on the flange l4, and may be secured in that position by means of the clamping screw bolt l5. Thus the .tool vmay be supported at any of a plurality of lug 24 which preferably extends oppositely to the slot 2|, and which is provided with a through bore 25 by means of which the tool I 0 may be supported upon this member.

Lug 24 is located toward one side of the supporting member 3, that is, the right side, for example, as seen at the top of Fig. 1, so that the body IQ of this member will not interfere with other parts of the device when the other parts are rotated on the supporting member.

The tool l0 preferably comprises a pair of metal- 'members 26 and 21 which are supported by, and

spaced from each other by an insulating member 28. The insulating member 28 so supports the fuse link that it is not shorted out during its application to a cutout. This is necessary, since a short-circuit might exist on the line or device which is being fused, and the metal members 26 and 21 which support the fuse link must be insulated from each other in order that the fuse may be interposed in the circuit rather than some other conducting member, and thus fuse protection is provided by the device during the application of the fuse.

The second purpose of the insulating member :28 is to shield and protect the operators face and eyes from fuse particles and from the flash of a resulting arc in the event a short circuit or a surrounds the fuse link, and such a shield may .be economically made out of a sectionof a tube. In other embodiments of the invention the shield may, however, take different shapes and need not necessarily be cylindrical.

, The shield 28 is provided with a pair of straight edges 29, 30, and at its ends it preferably is beveled off, the beveled end portions being indicated by 3| and 32. The upper metal member 26 may consist of a rigid metal casting having an elongated body portion 33 which is provided with aipair of apertures 34 on its flat lower end for receiving the rivets 35 which pass through this end and through the shield 28 and secure the metal member 26 to the shield in axial position.

The body 33 of the upper member 26 may taper toward its upper end and may have a longitudinally extending reinforcing rib "36. At its upper end it may have a laterally projecting lug 3'! provided with a plane surface 38 which engages the plane surface 39 on the lug 24 of the supporting member IS.

A through bore 40 is provided in the lug 31 which registers with the bore 25,-both these bores receiving the rivet-41 by means of which the supporting member 18 is secured to the upper metal member 26 in such manner as to permit relative rotation between these parts on an axis which is substantially at right angles to the axis of the clamping screw bolt 1 5 of the universal pole H.

Thus the tool It is supported for rotation on 'two axes at right angles to each other, so that it is capable of a substantially universal adjustment'with respect-to theoperating pole H. One of these adjustments, that is, the one provided by the rivet 4|, may be utilized while the tool is being-manipulated at the end of the pole l I as the rivet 4| holds the supporting member l8 and upper metal member 26 frictionally against each other so that rotation may still occur if suflicient rotative force is applied by manipulating the pole.

A spring washer 42, located between "the head of the rivet 4| (Fig. 1) and the lug'24, maintains a constant pressure between these parts, and provides -a predetermined friction against rotative movement between them.

The upper metal member 26 extends upwardly, and toward the right in Fig. 1, from the lug 31, and is provided with an arm 43 which has a horizontally extending hook formation '44 at its end. This hook has apointed end 45 and a relatively shallow grooveor depression 46 adapted to receive the ringer loop 41 which 'is carried by the end of the standard fuse link.

The width of the pointed end portion 45 and the hook 44 is such that this hook may be receivedin'the narrow end portion 48 of the ring 41 on the fuse link. Thus the upper end of the fuse link in Fig. 1 may be secured on the hook '4 but it should be noted that the present tool may be adjusted to any position in which the hook 44 may be located horizontally with respect to the other end of the tool, or even below the other end of the tool.

The metal member 2'! atthe other end of the insulating shield 28-is preferably made of resilient material, such as spring brass or spring copper o spring'bronze, .in order that it may place a predetermined tension on the fuse link being 'installed. Thus member .21 consists of a relatively wide strip of "this spring material which is relatively thin.

The strip includes an attaching portion 49 which :may 'be bent to partially cylindrical form to fit inside the partially cylindrical shield 28. A pair of registering through bores 50 are pro- Y vided in the strip 21 and the shield 28 for receiving the rivets 51 by means of which this strip is fixedly secured to the lower end of the shield 28.

From its attaching portion 49 the spring strip -21 extends downwardly and rearwardly with an easy bend at 52, and it is provided with a substantially U-shaped portion 53 which terminates in' a downwardly and forwardly extending, substantially straight arm 55. The straight portion 54 is provided with an upwardly curved portion forming a lower groove 55 which is located forwardly of the shield 28 by an amount which is at least as much as the forward location of the hook 44.

In order to provide for the support of fuse links of different length, the groove 55 may be located still farther forwardly of the shield 23, as shown in Fig. 1, so that a longer fuse link would involve the arm 54 being bent farther downwardly while still maintaining the link in a central position with respect to the shield, but spaced therefrom.

From the grooved portion 55 of the arm 5% this metal strip is then bent diagonally forwardly and downwardly, providing a downwardly extending portion 56. This end portion 55 is provided with a slot 51 which is of sufiicient width so that the two fingers 53 which comprise the end portion 56 may be located on either side of the lower ring 59 of a fuse link, when this ring has its attaching portion located in the slot 57.

The slot 57 extends into the arm 53 to the point 60 just beyond the groove 55, and thus the lower end of the fuse unit may have its ring engaged in the forked end of the resilient member 2?.

The resilient member if is initially bent to extend downwardly at a greater angle than that shown in Fig. 1, so that when the fuse unit is attached, the fuse link is under a predetermined tension which holds its rings in engagement with the hooks 34 and 56. Thus the fuse link does not dangle as it does in the devices of the prior art, and it may be held in any position, vertical, horizontal, or angular, and even inverted, if necessary, during its application to the cutout.

The fuse link or unit 51 may consist of any standard type of fuse link. The one selected for illustrating the invention comprises a pair of flexible metal cable portions 82, E3 joined to the rings 4'! and 59 respectively. The upper ring 4? usually has the narrow upwardly extending portion 48 which is intended to receive the laterally projecting prong of a disconnect stick, while the round portion of the ring 4? is made of larger size in order to pass the head which is carried by this prong.

The lower ring 5% is usually round, and both of these rings are formed of suitable wire and have their parallel end portions 56, 65 clamped in a ferrule member 66 with the end 6'! of the cable between the end portions. This metal ferrule is brought into firm conducting contact and clamping position with the rings 59 and 41 and their respective cables by flattening the cylindrical portion 68 of the ferrule and also producing an elongated depression or slot 6! in one of its sides which forms an inwardly extending rib which forces its way into the braided cable and anchors it securely in the ferrule; at the same time, the

indicated at 10 for the lower ring 59.

Each of these ferrules is also provided with'a radially extending flange 1| having a partially spherical surface 12 on the side opposite to the ring. The flange H has an enlarged aperture 13 for cables 62 or 63, thus permitting a limited universal adjustment of the ferrules (it and 16 with respect to the axis of the cable. It is the partially spherical surfaces 12 which are adapted to engage the contact arms of the cutout which is to be fused.

The flexible cables 62 and 63 extend into an insulating tube 74 comprising a laminated member impregnated with a phenolic condensation compound, and the ends of the cables 62 and 63 are joined in the tube by being soldered to a fusible section of a predetermined metal which is adapted to melt upon the application of a predetermined amount of current.

Metal ferrules 15 are located at each end of the tube 14 for guiding the cables 62, 63, and at one end of the tube 14 the cable 63 is surrounded by a compression spring 16 which is compressed between the ferrule 15 and a ferrule T! which is clamped on the cable 63 in the same manner as shown at 68. The compression spring i6 is under a predetermined initial compression so that when the fuse ruptures it assists in drawing the cable out of the lower end of tube 14.

Referring to Figs. 4 to 7, these views illustrate one way of using the tool in re-fusing a cutout of the fused type. Such cutouts may be of any desired construction, but the one which is selected to illustrate the invention is mounted upon a bracket 18 which surrounds and clamps a porcelain insulator 19.

The insulator 19 has sockets in its ends in which metal fixtures are anchored for supporting the fixed arm and the movable contact arm 8|. The movable contact arm 8| may be itself resilient, or it may comprise a pivotal mounting in the housing 82 which is provided with spring means for urging the arm 8! downward.

Connectors 83 and 84 are provided on the cutout for connection to the circuit which is to be fused, but these connectors and the arms 80 and 8| are insulated from each other by the porcelain insulator 19 so that the current must pass through the fuse.

Both of the arms 80 and 8| are provided at their outer ends with one or more contact fingers 85 which form a V-shaped opening 86 in conjunction with the. arm 8i] or 81. Thedirection of pull on a fuse link between the arms 89 and BI is such that the tension which is placed upon the link by the spring-pressed arm 8! tends to pull the link farther into the groove 86.

The method of operation and mode of use of the tool is as follows: When the fused cutout has its movable arm located below, then the fuse link may be arranged upon the tool as shown in Fig. 4. The tool is carried by the universal pole ll extending downwardly but outwardly from the pole at an angle, and the link 14 has its upper ring carried by the hook 44 and its lower ring 59 carried by the resilient arm 21.

The shield 6| should be rotated until it is located between the eyes of the operator and the link 14 so as to protect the operator from flying particles of the fuse and from the flash which would result from a rupture of the fuse.

Referring to Fig. 5, the link 14 is then brought into a position with its lower cable portion 63 adjacent the movable or resilient contact arm 8| of the cutout. The cable section 63 is brought against the side of the arm 8|, after which the tool assembly and link is moved outwardly of the ferrule-l into. .engagement'with the lower side of the contact armv 8| at the partiallyspherical surface 12. Then the operator pushegupwardly position than the stationary. arm. In .such; case on the pole and so manipulates the; pole. that the upper cable section 62 engages the side. of the fixed .contact armBfl on the cutout. The tool is thensomanipulated that the cablezsection 62 slides-outwardly on the sideof the fixed contact arm 80 untilcable'section 62 engages in a V- shaped groove 88 ofa contact 85. on the upper arm 80.

The parts are then in the position of Fig. 6, and as the operator lowers the operating pole H the spring pressure of the lower contact arm Bl of the cutout will tension the fuse link against the fixed arm 80. .As previously-stated, this tension tends to draw thecable sections 62 and 63 more tightly into the V-shaped grooves. 86 of the cutout arms.

As contact is made between the fuse link and:

the second arm 80 of .thecutout, if the cutout is energized it is. possible that the fuse might be ruptured due to an existing fault. With the devices of the-prior art, the lineman has no protection against suchrupture of the fuse, and present practice makes it necessary to deenergize the circuit before it is fused. With the present invention, it is not necessary .to deenergize the circuit, since the ruptureof the fuse .isshielded from .theperson and. eyes of the operatorby the shield 28.

This saves a. great deal of time ;on the part of the operator; as the prior art'devices require him to: make a trip to the nearestswitchgor circuit breaker to isolate the circuit which is being re;

fused and return to the cutout location to refuse the cutout. Then with the priordevices and practices he must travel again .to the. circuit opening device to re.-close the circuit; and return azsecond time tothe fused cutout toinspect the re-fused cutout. All .of these tripsare eliminated by using the present tool and methods of re-fusing.

Afterthe fuse link has engaged bothf -the lower and upper contacts .of thecutout, as; shown. in Fig; 6, the operator may move the tool. I0. down- .wardly, but the upper ring 4': of the link will not move downwardly, and will be held-in the same position projecting upwardly from the upper arm 86, as shown in Fig. .7. .Thus theqdownward -movement of the tool. If] willlresult in the remoral ofithehook M from the upper ring, and

during this motion the: lowerspring .21 on the tool will flex upwardly.

Then the tool will bein the position of Fig. 1'7. and it is only necessary for the operatortomove the tool :upwardlyf while the resilient. arm 21 is relieved of. its tension. -.Then the toolymay be moved backwardly. from the lower ring 59, and the slot 51 will slide off the lower ring, freeing the tool entirely from :the link, whichcontinues to .be held by the arms: 80-, 8120f the cutout.

-It should be noted that thereis no danger of pulling the link off the .arms as and 18!, while the tool is being freed .from the links,.-because the pull of the tool. inbecoming free of the ring only tends. to pull .the link more. tightly into the v- ..shaped grooves 86 :of thearms 80, 8 l

Insome :cases, the resilient pr: spring biased contact arm of the: cutout may beintalhigherit may bedesirable-to reverse the-positionpf the fuse link on the tool 10." initial contactwith the cutoutshould always-be madeitothe spring'biased cutout: armaso'rthatthe fuse link andgresilient arm may-then; he pulled; toward the stationary arm of the cutout.

The present tool maybe used for;installing fuses .irrespectiveiof the, position -.in which the contactgarmsof the cutouthappen to be.: S nce the fuse link is initiallytensionedby the tool, it does not-dangle; asit does with the devices of the prior art, and, by virtue of the pivotal connections to the pole, the fuse link may be arranged in any desired position; horizontal,- vertical, or at an angle.

'In any event, the pole and -shieldmay be so turned that the shield is interposed between the face of the operator and the fuse link,-so that if the fuse is -ruptured',,he willbe protected from flying particles of the fuse, and his eyes will be protected from the flash of the resulting arc.

A great deal of time may be saved by the use of this tool, because the operator may safely re-fuse'circuits while they are energized, and may, of course-inspect the installation of the fuse immediately upon removal of the tool.

WhileI have illustrated a preferred embodiment of my invention, many modifications may be made without-departing from the spirit of the invention, and I donot-wish to be limited to the precise details of construction set=forth, but desire to avail myself of all changes within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire-to secure'by Letters Patent of the United States is:

1.A tool for theinstallation of flexible: fuse links which comprises an;elongatedinsulating pole, a fuse link supporting member carried by said pole, said supporting member including an intermediate insulating portion anda fuse link engaging member at each of itsends for engaging with the members located at the ends of a standard fuselink, the said fuse link supporting membe-rbeing adjustably mounted on the end of saidinsulating pole whereby it may be moved into substantial alignmentwith the contact arrangements ,of a fused cutout-l assembly preliminary to the application of the fuse link to the latter, the said movable mountingincluding pivotal arrangements on-axes extending transversely to each other, giving a universaladjustment to the fuse linksupporting member.

2. A tool for theinstallation of flexible fuse links which comprises an elongatedinsulating pole, a fuse link supporting member carried by said pole, said supporting member including an intermediate insulating portion and; a fuse link engaging .membenat'each of its ends-for engaging with the members located atthe-ends of a standard fuse li-nk, said insulating portion comprising an insulating shield .adaptedto be interposed between the operator and the fuse link during its installation to protect the. operator from the results of a rupture-of the fuse link during installation.

3., A tool for installing flexible fuseelinks on fuse linkassemblies which comprises means for .engagement. with the loop at the end of a-flexible fuse link, and the other of said metal members comprising a resiliently urged hook for engaging the loop at the other end of said flexible link, said latter hook placing a predetermined tension on the fuse link to prevent its dangling and permit its being applied in any desired position, said insulating portion including an insulating shield to be interposed between the fuse link and the operator.

4. A tool for installing flexible fuse links on fuse link assemblies which comprises means for mounting the tool upon an insulating pole, said tool including a central elongated insulating portion and a pair of metal members, one extending from each end of said insulating portion, one of said metal members comprising a rigid hook for engagement with the loop at the end of a flexible fuse link, and the other of said metal members comprising a resiliently urged hook for engaging the loop at the other end of said flexible link, said latter hook placing a predetermined tension on the fuse link to prevent its dangling and permit its being applied in any desired position, said insulating portion including an insulating shield to be interposed between the fuse link and the operator, said shield comprising a curved insulating member subtending an are between the operator and the fuse link to produce a predetermined area of protection,

5. A tool for installing flexible fuse links on fuse link assemblies which comprises means for mounting the tool upon an insulating pole, said tool including a central elongated insulating portion and a pair of metal members, one extending from each end of said insulating portion, one of said metal members comprising a rigid hook for engagement with the loop at the end of a flexible fuse link, and the other of said metal members comprising a resiliently urged hook for engaging the loop at the other end of said flexible link, said latter hook placing a predetermined tension on the fuse link to prevent its dangling and permit its being applied in any desired position, said means for securement to an insulating pole comprising a slotted metal memher for receiving a clamping screw bolt, whereby it may be secured at any of a plurality of different angles, said slotted metal member having a pivotal connection to the first mentioned hook on an axis extending transversely to said clamping screw bolt.

6. A tool for applying fuse links to a fused cutout assembly comprising an insulating shield comprising a section of a tubular member adapted to extend about a portion of the fuse link, said tubular section supporting at one end a rigid metal member which extends axially and has a transversely extending grooved arm for engagement with the loop of a fuse link, said tubular section supporting at its other end a leaf spring which extends axially and is transversely bent and provided with a grooved formation at its end for engagement with the other loop of a fuse link, whereby the fuse link is placed under sufficient tension to hold it on the tool, and means for mounting said tool upon an insulating pole.

7. A tool for applying fuse links to a fused cutout assembly comprising an insulating shield comprising a section of a tubular member adapted to extend about a portion of the fuse link, said tubular section supporting at one end a rigid metal member which extends axially and has a transversely extending grooved arm for engagement with the loop of a fuse link, said tubular section supporting at its other end a leaf spring which extends axially and is transversely bent and provided with a grooved formation at its end for engagement with the other loop of a fuse link, whereby the fuse link is placed under sufficient tension to hold it on the tool, and means for mounting said tool upon an insulating pole, said means comprising a supporting member having a substantially circular flange provided with an inwardly extending slot adapted to receive a clamping screw bolt, said flange having its face provided with radial ribs and grooves for engagement with a complementary member on the pole, said supporting member being pivotally secured for tight frictional pivotal movement on said rigid metal member whereby the fuse link may, when supported on the tool, be adjusted universally to extend in the direction in which the contacts are arranged on a fused cutout assembly when the operator is in position to install the fuse link.

8. In a tool for applying fuse links to a fused cut-out assembly, a supporting body comprising an elongated, curved, insulating shield adapted to be interposed between the operator and the fuse unit, said shield being provided at one end with a resilient leaf spring having a forked and hook shaped end for engaging inside the ring of a standard fuse unit, and said shield carrying at its opposite end a substantially rigid hook member for hooking in the ring at the opposite end of a standard fuse unit, said rigid hook being provided with an aperture transverse to the fuse unit, a pintle in said aperture, and a supporting member pivotally mounted on said pintle, whereby the angularity of the fuse unit may be adjusted with respect to the supporting member into any of a multiplicity of different positions rotatively of said pintle.

9. In a tool for applying fuse links to a fused cut-out assembly, a supporting body comprising an elongated, curved, insulating shield adapted to resilient leaf spring having a forked and hook shaped end for engaging inside the ring of a standard fuse unit, and said shield carrying at its opposite end a substantially rigid hook member for hooking in the ring at the opposite end of a standard fuse unit, said rigid hook being provided with an aperture transverse to the fuse unit, a pintle in said aperture, and a supporting member pivotally mounted on said pintle, whereby the angularity of the fuse unit may be adjusted with respect to the supporting member into any'of a multiplicity of different positions rotatively of said pintle, said supporting member having an attaching flange provided with a slot for receiving a screw bolt, whereby the supporting member may be attached to a universal pole provided with a complementary flange and screw bolt for adjustment of the supporting member at any of a multiplicity of different angles on an axis transverse to said pintle.

DAVID C. HUBBARD.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,430,053 Bush Sept. 26, 1922 2,102,894 Fox Dec. 21, 1937 

